I'm studying for an exam and one of the practice questions is as follows: you're sending out mail and the probability is .4 that someone replies. How many letters do you need to send out so that you're reasonably certain at least 100 people will reply? It's about 292 according to my professors answe...

So I'm really quite awful at probability. I have a homework problem (so i'm not asking for the answer, rather guidance on how to think about it) A professor has a 20 question true/false reading quiz he's giving to his students. He wants to choose the passing grade such that there is less than a .05 ...

Hey all, long time no see. So I'm a sophomore at Boston University studying business and I've recently taken a keen interest into quantitative finance. I like to trade on the side to make a little bit of money and to learn, and I've been wondering about this for a while. Basically, on any given day,...

I just learned I can't join the Peace Corps until after college... I wanted to do a 2 year gap year serving in the PC. (I know 18 is the minimum age, but you need like 5 years in work if you want to apply before college, and it's too late for that.)

Okay, so recently i've seen one of those new question things on facebook with a SIMPLE question. six divided by two times the quantity of 1 and 2. 6÷2(1+2)=? the answers are 1 and 9 175,811 people voted 1. 238,144 people voted 9 people are doing this: 6/2(1+2) 6/2(3) 2(3)=6 6/6=1 it's sick and foul....

Relationship status is a unitless quantity. It can be expressed as: Value of being in a relationship with you -------------------------------------- Value of the average expected relationship The bottom tick-mark is, of course, at 1.0, meaning that he's finally hit the point of indifference. The ho...

I'm in the tenth grade, and I've been challenged by my math teacher to graph the bat symbol, because we were working with piecewise defined functions lately. After about four days of working and learning about ellipses and quadratics, I have successfully made it on my TI-84. I'll post my Y= if you ...

Sorry, I don't get it. It's lovely, but how does the title-text relate to the picture? So a universe doesn't need someone to observe it in order for it to exist. And both of them imagine the other imagening them. So overall that means, although they cannot observe if there is really someone imageni...

I remember it blowing my mind when I realized the Goodyear tire logo is a winged shoe. I always saw it as a snooty butler (wing was his nose in the air, shoe was his jacket/collar) See? There's even an eye! http://ts4.mm.bing.net/images/thumbnail.aspx?q=277387025463&id=cb6f3ed3f45292cc44f5df96c...

Say someone knocks you out and makes an exact atom for atom copy of you and anything you may be wearing. When you wake up how do you know if you are the copy or not. Remember that you can't even trust your own memories since they are the same for you and your copy. I will always have the bigger pen...

Yeah, this isn't homework, this is just what i do :p I wanted to know what modular arithmetic was and now i do. Hmmm, was the example you gave what you consider "modular arithmetic" or was that just a result needed to figure it out? EDIT: Also, study up on matrix reduction and solve a bun...